WHDownloader vs Competitors: Which Downloader Is Best?

Troubleshooting WHDownloader: Fixes for Common Errors

Symptom: Clicking the app icon does nothing or it closes immediately.
Fixes:
1. Run as administrator: Right-click → Run as administrator (Windows).
2. Check compatibility: Right-click → Properties → Compatibility → try Windows ⁄₇ mode.
3. Reinstall: Uninstall, reboot, download latest installer from the official site, reinstall.
4. Check antivirus/quarantine: Temporarily disable antivirus or check its quarantine; add WHDownloader to exclusions.

Symptom: Files start then pause, error out, or never finish.
Fixes:
1. Stable connection: Switch to wired or a reliable Wi‑Fi, pause other heavy network uses.
2. Server availability: Try downloading the same file in a browser; if server-side, retry later.
3. Adjust connections/threads: Reduce simultaneous connections or threads in WHDownloader settings.
4. Switch mirrors: If available, select a different mirror or source URL.
5. Temporary folder space: Ensure destination disk has enough free space and permissions.

Symptom: Service requires login and credentials are rejected.
Fixes:
1. Verify credentials: Log in via the provider’s website to confirm username/password.
2. Token/2FA: If two‑factor auth is enabled, generate an app password or follow provider’s recommended flow.
3. Clear saved credentials: Remove stored credentials in WHDownloader and re-enter.
4. Update integration: Ensure WHDownloader is up to date — API changes can break auth.

Symptom: Files won’t open or show unexpected size.
Fixes:
1. Checksum/verification: Compare file checksum (MD5/SHA256) with source if provided.
2. Resume/download again: Delete partial file and retry with resume disabled/enabled depending on server support.
3. Temporary disk errors: Run disk check (chkdsk on Windows; fsck on Linux) and try a different drive.

Symptom: Specific error codes (e.g., 403, 404, 429, timeout).
Fixes:
- 403 (Forbidden): Check access rights, login status, or referer header settings.
- 404 (Not Found): URL is wrong or file removed — verify source URL.
- 429 (Too Many Requests): Slow down request rate; increase retry interval or reduce parallel downloads.
- Timeout: Increase timeout in settings, check network latency, or try a different network.

Symptom: Browser extension or plugin for WHDownloader stops working.
Fixes:
1. Update extension and app: Keep both extension and WHDownloader updated to compatible versions.
2. Reinstall extension: Remove and reinstall browser extension; clear browser cache.
3. Enable permissions: Ensure extension has required permissions (storage, site access).
4. Check browser version: Some browsers drop legacy APIs; use a supported browser.

Symptom: WHDownloader uses excessive CPU, RAM, or disk I/O.
Fixes:
1. Limit concurrent downloads: Lower simultaneous downloads and thread counts.
2. Schedule tasks: Run large downloads during off‑peak times.
3. Close other apps: Free system resources by closing unused programs.
4. Update system drivers: Ensure network and storage drivers are current.

Steps to gather useful info:
1. Enable verbose logging in WHDownloader settings.
2. Reproduce the error and save the log file.
3. Check system logs: Event Viewer (Windows) or syslog (Linux/macOS).
4. Include logs when seeking support (remove any personal tokens before sharing).

Contact support if:
- You’ve tried above fixes and errors persist.
- Errors involve account billing, server outages, or data loss.
What to include: App version, OS version, exact error message/code, steps to reproduce, and log file.

If you want, I can create a concise troubleshooting checklist or draft a message to support including your log details.